TiO2/cellulose nanocomposites (TiO2/NC NCPs) have been successfully synthesized using natural sources from sugarcane bagasse and titanium butoxide precursors’. The obtained results from Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) micrographs show that the TiO2/NC NCPs particles with average size respective ~4.5-10 nm (TiO2 nanoparticle) and ~10-25 nm (cellulose nanorectangular) are distributed well and homogeneous. Besides, X – ray Diffraction (XRD) displays nanocellulose (NC) which is high crystallinity (~77%) and nanotitanium dioxide (NT) is anatase phase. Energy Dispersive X-ray Spectrometry (EDX) spectra demonstrates that NT exists in the samples. The band-gap of new material also is decreased, which allows to enhance photocatalytic ability. Moreover, TiO2/cellulose nanocomposites are used as nanomaterials with high photocatalytic and adsorption ability for degradation of methylene blue (MB) under support of the sunlight and hydroxy peroxide. The decompositional yield of MB reaches up to 98.3% within 90 min. Last but not least, the material also can be reused simply to decaying MB with 3 cycles.